Tarabya Sewage Tunnel
Turkey, Istanbul
2000 – 2003

A sewage tunnel was constructed between Sariyer and Baltaliman, along the Bosporus coast on the European side of Istanbul, to dam the contamination of seawater on the Bosporus.

Work commenced with a Double Shield TBM (S-166) in July 2000. With a diameter of 2,870mm, the TBM tunneled through slightly less than 9.5 kilometers of limestone, sandstone, and silt. Tunnelling ended in March 2003 when the machine entered the target shaft.

Data Sheet

Country, Location

Turkey, Istanbul


2000 – 2003




Limestone, sandstone, silt

Tunnelling length

9,333 m

Machine Data

1x Double Shield TBM:
Diameter: 2,860 mm
Lining method: Segmental lining
Cutterhead power: 560 kW
Torque: 597 kNm

Your contact person Contact us

Steffen Dubé President and General Manager Herrenknecht Tunnelling Systems USA Inc.
Gerhard Goisser Commercial Manager Herrenknecht Tunnelling Systems USA, Inc.